my experience with cars has always been piston engines and carbs i picked up an 83 gs and it feels good but unfortunatley lost a race to my friends alero (sad eh) so needless to say i need to do some work so i have already modded the carb to mechanical secondaries but dunno what else i can do to a rotory that wont involve ripping the engine out any suggestions?

 

It all starts with the exhaust system if you don't want to go into the engine...and a lil' laughing gas, say a 50 shot, should do it.

Mario III

 

None of this requires removing the engine. and I don't know what your skill level is. that said this is what I did. not a guide but more just some ideas

step 1 Strip everything you don't use out (in the first gen without seats this can be quite a bit from the bucket area behind the seats)Carpet, air cond, air pump, emiss, soundproofing tar paper, trim, carpet, pass seat, as much or as little as you like

step 2 complete exhaust or (if your broke) replace the cat with a delete pipe, pull the muffler and add an under 2 id inch "turbo muffler" (small cheap low back pressure lighter muffler)may need an adapter.

step 3 be sure you have a dizzy and not a points ignition system. then get msd coils the ones that are the same canister style. good not cheep, wires and plugs.

step 4 get lighter rims with lower profile tires (don't go with larger ones. just don't)

step 5 get a "spare" carb and rebuild it look at how to do things like polishing and thinning the ventri and carb inside wall, going to larger ?needles? cant remember what they are called. and i believe a carb mod can be done to prevent lean out in corners.

step 6 match the intake manifold inlet to the carb (the one you fixed up) smooth out non matching areas then polish the inside, do the same on the intake manifold to engine side(only on the manifold this step will destroy your engine if you try to come up with some foolish way to do any grinding and polishing while on the engine. just saying.)

step 7 do the same as above with the exhaust manifold

 

thanks i thought about porting the intake and exhaust manifolds but wasnt sure if it would do any good on a rotory. my experience is mostly with v8s it wont be a problem to pull the intake and exhaust as i have done that a few times i have an engine hoist and have been planning on pulling the engine i also found a couple 13bs at a wreckers (turbos were gone but that just means upgrade) what internals whould be worth doing? oh and I love carbs cars just sound better that way (plus no electrical head ache) can i run a carbuerated 13b?

 

yes you can run a carbed 13b you just need the coil pack and a few other things from the 12a and go to racing beats website for carb set ups and ****. As far as internals your only looking at lightening the rotors by machining or buying higher compression ratio rotors from lets say an S5 FC or something, dowel pinning the e shaft, porting the intake and exahust ports to your choosing, and polishing the same ports you just ported bigger, 3mm apex seals and thats all I can think of but should give you an idea to start looking

 

Get into the 1st Gen tech section and start reading. Some of the advice you have received so far is good, some can lead to less power than you had to begin with (port matching the manifold, for instance).

What you are looking to do has already been done by hundreds. Mistakes have been made, lessons have been learned, and better methods have been devised. All of this is documented on this site, so all you have to do is read and learn.



.

 

what about stability i have heard rotorys can make awesome power but if certain things are done they can destroy your block is that just from being cheap and buying low quality parts or is there another cause?

 

well basically stay away from ebay random brand name crap. i know that for fc's you are supposed to use a oem thermostat vs. after market because they happen to make the car over heat. i dont think that is a fb problem but just saying that some things are specific to which model rx7 you have. using the wrong apex seals can destroy the block on the inside because they wont seat right and score the hell out of your irons along with many other things during a rebuild. Just do what kentetsu said and read read read. I am self taught from this site! I learned soooo much by just reading. Maybe you should download the factory service manual for free and the haynes manual too. they help a ton too

 

yeah one of the first things i did was pick up a haynes manual and i have been looking through out the site im building both my fb and my friends camaro and i want to smoke the camaro so ive been doing tonnes of research

 

oh and i looked for an msd ignition and got the parts guy at work to look but couldnt find one. can anyone point me in the right direction

 

ya i agree. exhaust and intake flow is key